// streams/Prime.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.

import java.util.stream.LongStream;

import static java.util.stream.LongStream.iterate;
import static java.util.stream.LongStream.rangeClosed;

public class Prime {
    public static boolean isPrime(long n) {
        return rangeClosed(2, (long) Math.sqrt(n))
                .noneMatch(i -> n % i == 0);
    }

    public LongStream numbers() {
        return iterate(2, i -> i + 1)
                .filter(Prime::isPrime);
    }

    public static void main(String[] args) {
        new Prime().numbers()
                .limit(10)
                .forEach(n -> System.out.format("%d ", n));
        System.out.println();
        new Prime().numbers()
                .skip(90)
                .limit(10)
                .forEach(n -> System.out.format("%d ", n));
    }
}
/* Output:
2 3 5 7 11 13 17 19 23 29
467 479 487 491 499 503 509 521 523 541
*/
